Gear puller



E. E. GOOD GEAR FULLER Filed Jan. 2'7. 1922 INVENTOR ATTORNEY Patented Oct. 16, 1923.

STATES EDWARD 1:. GOOD, or DLDrr'roN, onto.

GEAR FULLER.

Application filed January 27, 1922. Serial No. 532,309..

This invention relates to pushing and ulling implements, particularly to devices for pulling off gears, pulleys and the like from their supporting shaft, and has for lts object the provision of a novel device whlch is adapted for pulling off machine elements of this character by engaging externally thereon.

An important object is the provision of a tool of this character which is adjustable whereby it may be operativcly engaged upon machine elements of widely different sizes, the matter of adjustment being a simple one and being very rapidly made.

Still another object is the provision of a device of this character which is provided with a ratchet operated screw means for applying the necessary power for pulling off gears, pulleys and the like, the construction being furthermore such that bindlng of the power screw within-the supporting and other portion of the device w1ll be positively prevented.

An additional object is the provision of a device of this character which will be simple and inexpensive in manufacture, highly efficient in use, rapid and positive in action, durable in service and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the device with parts broken away and in section,

Figure 2 is a cross section on the line 2-2 tudinally of the device and showing the operating ratchet.

Referring more particularly to the drawings, the numeral 10 designates the body or housing of the device which is formed trapezoidal in shape and which has a rectangular central opening 11 at opposite sides of which extend wings 12. At its larger end this frame or body is formed with a hollow cylindrical extension 13 which has a smooth bore 14 and which has its outer periphery threaded.

Keyed or splined through this frame member 10 is the operating screw 15 which is of course threaded throughout its length and which has one end formed with a concavity 16 and which has its other end carrying a swivclled head 17 for a purpose to be described. The recess end 16 of the screw is designed for engagement against the end of the shaft from which the pulley, gear or other element is to be pulled.

Threaded upon the extension 13 of the frame or body is a nut member 18 formed at one end with a frusto-conical flange 19 and provided at its other end with an operating head 20 which is shaped for convenient engagement within the operators hand whereby it may be turned with ease.

The numeral 21 designates the operating lever of the device which is formed at one end with an enlarged head 22 having a central opening 23 therein within which is rotatably engaged a ratchet 24 which has a threaded bore 25 having screwed engagement upon the operatlng screw 15. The 'enlarged head 22 of the lever and the ratchet 24 are located within the opening 11 in the frame 10 as clearly shown. The enlarged head 22 of the operating lever is also formed with an openin 26 and a recess 27 communicating therewith. The numeral 28 designates a pawl which is located within the head 22 and which has a stem 29 disposed within the recess 27 and which is formed intermediate its ends with a knurled operating head 30 access to which may be had through the opening 26.

So that the device may be used for pulling off gears, pulleys and the like, I make use of a plurality of arms 31 which terminate at their free ends in inwardly directed hooks 32 and which have their other ends formed with curved extensions 33 en aging back of the flange 19 on the nut mem er 18. These arms are pivoted at the corners of the frame 10 by suitable bolts indicated at 34.

In the operation of the device consisting of the above mentioned parts, it is necessary to run out r retract the operating screw 15 and then screw down the nut member 18 ioo upon the c lindrical extension 13 of the frame in or or that the arms 31 will spread apart a sufficient distance that they may be engaged over the periphery of the gear, pulley or other similar machine element to be pulled. The nut member 18 is then unscrewed so that the flange 19 thereofengaging against the curved rear extensions 33 of the arms will cause the arms to swing upon ment of the screw owing to the fact that the screw itself is splined with respect to the frame '10 and cannot rotate with respect thereto. When the free end 16 of this operating screw engages against the end of the shaft upon which the pulley or gear to be drawn off is mounted, it will be apparent that a powerful action or pressure will be exerted upon the. pulley, gear or the like which will result in pulling it off from the shaft. By graspin the operating head 30 of the pawl and li ting the pawl up out of engagement with the ratchet 24, I then reverse'its position and subsequently allow it to .drop back, it being apparent that the ratchet mechanism may be caused to operate in either direction as may be found necessary.

From. the foregoing description and a study of the drawings it will be apparent that -I have thus provided a simply constructed and consequently inexpensive device which will be highly efiicient for use in pulling off gears, pulleys, drums and the 1 ke from shaftings and which is also adaptable for other purposeswhich may suggest themselves. Owing to the simplicity f the construction and the fewness'of the parts, it

is apparent that there is nothing toget out of order and that the device should consequently have a long life and satisfactorily perform all the functions for which it is intended.

While'I have shown and described the preferred embodiment of the invention, it is of course to be understood that I reserve the right to make such changes in the form,

construction and arrangement of parts aswill not depart from the spirit of the in vention or the scope of the subjoined claim.

Having described my invention I claim A puller of the character described comprising a frame formed with an opening and having a cylindrical externally threaded extension, the extension and the frame being formed with a smooth bore intersecting said opening, a plurality of arms pivoted upon the frame and-terminating in hooks adapted "for engagement with the elementto be pulled, said arms being pivoted intermediate their ends and having the ends opposite the hooks formed with cut out, por- 

